某数字T/R 组件液冷冷板的改进设计

文中针对某数字T/R组件出现的局部过热问题,对原有液冷冷板进行改进设计。组件加工工艺由传统的铣削加工改为一体压铸成型,冷板流道改为铜管嵌装结构,并引入微通道散热技术,分别设计直齿微通道散热模块和菱形柱微通道散热模块。测试结果表明:微通道散热模块对散热效果改善明显,可解决局部过热问题;引入微通道散热模块后冷板流阻有所增加,但在允许范围内;菱形柱微通道散热模块由于边界层重新发展和二次流的产生,散热效果比直齿微通道散热模块好,热流密度越高,改善效果越明显。文中数字T/R组件最终选用直齿微通道散热模块的流道结构。菱形柱微通道散热技术可在更高热流密度的情况下应用。

Optimization Design of Liquid Cold Plate for a T/R Module

To solve the overheat problem in local area of a T/R module, improvements design is carried out for the original liquid cold plate. The T/R module cabinet is processed using die-casting instead of milling. Cold plate flow channel adopts copper-pipe embedded structure. Mini-channel cooling technique is introduced, continuous fins and oblique fins are used in mini-channel heat sink. Experimental investigation demonstrates that the mini-channel heat sink results in a much improved heat transfer performance, overheat problem can be solved; cold plate flow resistance increases when using mini-channel heat transfer enhancement scheme, but it is within the acceptable range; the combination of boundary layers re-development and secondary flows generation in oblique fins mini-channel heat sink causes improved heat transfer performance comparing to continuous fins, and the improvement effects is more obvious when the heat flux is more high. Continuous fins mini-channel is adopted for the T/R module in this paper. Oblique fins mini-channel technique can be widely used in cold plate with higher heat flux.